Hydrogen bond network structures based on sulfonated phosphine ligands: The effects of complex geometry, cation substituents and phosphine oxidation on guanidinium sulfonate sheet formation

The crystal structures of seven compounds containing guanidinium or substituted guanidinium cations and derivatives of the sulfonated phosphine PPh2C6H4-m-SO3- are reported. The effects on the supramolecular structure of inclusion of the trans-[IrCl(CO)(PPh2C6H4-m-SO3)2]2− anion is investigated, along with those of substitution on the cation and incorporation of a phosphine oxide group which is a competing hydrogen bond acceptor.